/*
 * Alloy Analyzer
 * Copyright (c) 2002 Massachusetts Institute of Technology
 *
 * The Alloy Analyzer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * The Alloy Analyzer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the Alloy Analyzer; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package alloy.ast;


public class BinaryExprOp extends Op {

    /**
     * different binary expr ops
     */
    public static final BinaryExprOp JOIN_DOT           = new BinaryExprOp(".",  false);
    public static final BinaryExprOp JOIN_DOUBLECOLON   = new BinaryExprOp("::", false);
    public static final BinaryExprOp JOIN_SQBRACKETS    = new BinaryExprOp("[]", false);
    public static final BinaryExprOp UNION              = new BinaryExprOp("+",  true);
    public static final BinaryExprOp DIFF               = new BinaryExprOp("-",  false);
    public static final BinaryExprOp INTERSECT          = new BinaryExprOp("&",  true);
    public static final BinaryExprOp RELATION           = new BinaryExprOp("->", false);
    public static final BinaryExprOp RELATIONALOVERRIDE = new BinaryExprOp("++", false);
    public static final BinaryExprOp DOMAINRESTRICT     = new BinaryExprOp("<:", false);
    public static final BinaryExprOp RANGERESTRICT      = new BinaryExprOp(":>", false);

    private BinaryExprOp(String opString_, boolean commutative_) { 
        super(opString_, commutative_);
    }

    /**
     * accept an AST visitor
     * @param visitor_ the visitor
     */
    public void acceptVisitor(ASTVisitor visitor_) {
        visitor_.visit(this);
    }

    /**
     * accept a returning AST visitor
     * @param visitor_ the visitor
     * @return the Object returned by the visitor
     */
    public Object acceptReturnVisitor(ASTReturnVisitor visitor_) {
        return visitor_.visit(this);
    }

}
